feat: add more roles (tech_lead, scrum_master, product_owner, designer, qa)

- Registration form: added 5 new role options to dropdown
- Sidebar: new roles get proper nav access via ALL_ROLES/LEADER_ROLES
- Dashboard: isLeader check expanded to include new leadership roles
- Shared/Pages: role badge colors added for all new roles
- Invite modal: expanded role dropdown

server/vitest.config.js

@@ -0,0 +1,9 @@
+
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+    test: {
+        globals: true,
+        environment: 'node',
+    },
+});